Morphological and molecular characterization of the cryptic species Myxobolus cataractae n. sp. (Cnidaria: Myxozoa: Myxobolidae) parasitizing Imparfinis mirini (Siluriformes: Heptapteridae)

Autor(es)

Dias Vieira, Diego Henrique Mirandola ; Narciso, Rodrigo Bravin ; da Silva, Reinaldo Jose

• Tipo de documento: Artigo Científico
• Fonte: Parasitology International; v. 88, p. 8-pg., 2022-02-16.

Resumo

We describe Myxobolus cataractae n. sp., found parasitizing Imparfinis mirini from Cachoeirinha stream, a tributary of Pardo River, Parana River basin, municipality of Botucatu, Sao Paulo State, Brazil. We based the description on myxospore morphology, histology, and small subunit ribosomal DNA partial sequences. Whitish and elongated mass of myxospores were found in gill filaments, occupying an intrafilamental position. The myxospores were slightly ellipsoidal and the morphometric measurements revealed a myxospore body length of 7.8 & PLUSMN; 0.4 pm; myxospore width of 5.9 & PLUSMN; 0.4 pm; and thickness of 3.9 & PLUSMN; 0.3 pm. The polar capsules are equal in size and measured 3.5 & PLUSMN; 0.2 pm in length and 1.7 & PLUSMN; 0.2 pm in width. The polar tubules had 6-7 coils. Myxobolus cataractae n. sp. is classified as the intrafilamental type and chondreal subtype by the histological analysis of gills. Phylogenetic analysis showed a well-supported subclade formed by species that parasitize gills of Siluriformes, with M. imparfinis as a sister species of Myxobolus cataractae n. sp. Using molecular and morphological characterization, this cryptic species was identified as a new species of the genus Myxobolus. (AU)

• Processo FAPESP: 20/05412-9 - Diversidade, taxonomia e sistemática de parasitos de peixes do Rio Pardo, Médio Rio Paranapanema, São Paulo
• Beneficiário: Reinaldo José da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOTA - Regular
• Processo FAPESP: 19/19060-0 - Sistemática e distribuição de mixozoários coletados em peixes oriundos do Rio Pardo, médio Rio Paranapanema, São Paulo
• Beneficiário: Diego Henrique Mirandola Dias Vieira
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 19/26831-2 - Diversidade e sistemática de ergasílideos parasitas de peixes do Rio Pardo, Médio Rio Paranapanema, São Paulo
• Beneficiário: Rodrigo Bravin Narciso
• Modalidade de apoio: Bolsas no Brasil - Doutorado